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. 2021 Jun 18;33(30):2101955. doi: 10.1002/adma.202101955

Figure 1.

Figure 1

Mechanism of amine‐acrylate aza‐Michael addition for curing polymer networks. a) Different addition kinetics of 1st and 2nd hydrogen of aliphatic primary amines towards acrylates. b) Differentiated kinetics resulted in sequential stages for diacrylates reacting with diamines. While the 1st hydrogen basically participated in chain extension, the remaining 2nd hydrogen would initiate random branching with excessive acrylates to cure the network.